.nav-box{
	height: 50px;
	position: fixed;
	top: 0;
	z-index: 99;
	background:rgba(0,0,0,0.0); 
	transition: all 1s ease;
}
.nav-box li{
	width:150px;
	height: 50px;
	display: inline;
	float: left;
}
.nav-box a{
	font-family: "微软雅黑";
	font-weight: 400;
	line-height: 46px;
	color: #000000;
	display: block;
}
.nav-box a:hover{
	text-decoration: none;
	color: rgb(42,57,114);
	border-top: 4px solid rgb(140,210,190);
}